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Engine will not start. Various engine problems. Refer to the engine manual accom-
panying your unit.
Low engine oil level. Engine is equipped with an Oil Alert
System which will not allow the
engine to start if oil level is low. Add
oil, if needed.
Noisy operation. Loose engine pulley or pump y-
wheel.
Tighten pulley and or ywheel.
Lack of oil in the pump. Add correct amount of oil. Check
for bearing damage.
Carbon deposits on pistons or
valves.
Remove cylinder head and inspect.
Clean or replace.
Bearing, piston or connecting rod
failure.
Stop the air compressor. Contact
Graco Customer Service.
Pressure drop in air tank or rapid
pressure loss when air compres-
sor is shut off.
Air leaks at connections. Allow air compressor to build
pressure to the maximum allowed.
Turn off and brush a soapy wa-
ter solution onto all connections.
Check connections for air bubbles.
Tighten the connections where
leaks are present.
Air leak in air tank. Air tank must be replaced. DO NOT
attempt to repair air tank.
Defective Pilot Valve. Clean or replace.
Insufcient pressure at air tool or
accessory.
Pressure Regulator not turned to
high enough pressure or defective.
Adjust Pressure Regulator to
proper setting or replace.
Restricted air intake. Clean or replace Air Intake Filter.
Air leaks or restrictions. Check for leaks and repair.
Hose or hose connections are too
small or long.
Replace with larger hose or con-
nectors.
Slipping belt. Tighten or replace.
Air compressor is not large enough
for air requirement.
Check the accessory air require-
ment. If it is higher than the CFM or
pressure supply to the air compres-
sor, use a larger air compressor.
Restriction in Pilot Valve Clean or replace.
Air leaks from Safety Relief Valve. Possible defective Safety Relief
Valve.
Operate Safety Relief Valve manu-
ally by pulling on ring. If it still
leaks, it should be replace.
Excessive air tank pressure. Clean, reset or replace Pilot Valve.
Air leaks at pump. Defective gaskets. Torque head bolts: Single Stage=17
ft./lbs. Two Stage=33 ft./lbs.
Air blowing from Air Intake Filter. Defective inlet (reed) valve. Contact Graco Customer Service.
Moisture in discharge air. Condensation in air tank caused by
high level of atmospheric humidity
or air compressor is not run long
enough.
Run air compressor a minimum of
one hour to prevent condensation
buildup. Drain air tank after every
use. Drain air tank more often in
humid weather and use an air line
lter.